svn commit: r350014 - head/tests/sys/kern
John Baldwin
jhb at FreeBSD.org
Mon Jul 15 21:26:55 UTC 2019
Author: jhb
Date: Mon Jul 15 21:26:55 2019
New Revision: 350014
URL: https://svnweb.freebsd.org/changeset/base/350014
Log:
Add a test for PT_GET_SC_ARGS.
Reviewed by: kib
MFC after: 1 month
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D20899
Modified:
head/tests/sys/kern/ptrace_test.c
Modified: head/tests/sys/kern/ptrace_test.c
==============================================================================
--- head/tests/sys/kern/ptrace_test.c Mon Jul 15 21:25:16 2019 (r350013)
+++ head/tests/sys/kern/ptrace_test.c Mon Jul 15 21:26:55 2019 (r350014)
@@ -3904,6 +3904,86 @@ ATF_TC_BODY(ptrace__PT_LWPINFO_stale_siginfo, tc)
ATF_REQUIRE(errno == ECHILD);
}
+/*
+ * A simple test of PT_GET_SC_ARGS.
+ */
+ATF_TC_WITHOUT_HEAD(ptrace__syscall_args);
+ATF_TC_BODY(ptrace__syscall_args, tc)
+{
+ struct ptrace_lwpinfo pl;
+ pid_t fpid, wpid;
+ register_t args[2];
+ int events, status;
+
+ ATF_REQUIRE((fpid = fork()) != -1);
+ if (fpid == 0) {
+ trace_me();
+ kill(getpid(), 0);
+ exit(1);
+ }
+
+ /* The first wait() should report the stop from SIGSTOP. */
+ wpid = waitpid(fpid, &status, 0);
+ ATF_REQUIRE(wpid == fpid);
+ ATF_REQUIRE(WIFSTOPPED(status));
+ ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);
+
+ /*
+ * Continue the process ignoring the signal, but enabling
+ * syscall entry traps.
+ */
+ ATF_REQUIRE(ptrace(PT_TO_SCE, fpid, (caddr_t)1, 0) == 0);
+
+ /*
+ * The next stop should be the syscall entry from getpid().
+ */
+ wpid = waitpid(fpid, &status, 0);
+ ATF_REQUIRE(wpid == fpid);
+ ATF_REQUIRE(WIFSTOPPED(status));
+ ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);
+
+ ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
+ ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);
+ ATF_REQUIRE(pl.pl_syscall_code == SYS_getpid);
+
+ ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
+
+ /*
+ * The next stop should be the syscall entry from kill().
+ */
+ wpid = waitpid(fpid, &status, 0);
+ ATF_REQUIRE(wpid == fpid);
+ ATF_REQUIRE(WIFSTOPPED(status));
+ ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);
+
+ ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
+ ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);
+ ATF_REQUIRE(pl.pl_syscall_code == SYS_kill);
+ ATF_REQUIRE(pl.pl_syscall_narg == 2);
+
+ ATF_REQUIRE(ptrace(PT_GET_SC_ARGS, wpid, (caddr_t)args,
+ sizeof(args)) != -1);
+ ATF_REQUIRE(args[0] == wpid);
+ ATF_REQUIRE(args[1] == 0);
+
+ /* Disable syscall tracing and continue the child to let it exit. */
+ ATF_REQUIRE(ptrace(PT_GET_EVENT_MASK, fpid, (caddr_t)&events,
+ sizeof(events)) == 0);
+ events &= ~PTRACE_SYSCALL;
+ ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, fpid, (caddr_t)&events,
+ sizeof(events)) == 0);
+ ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
+
+ /* The last event should be for the child process's exit. */
+ wpid = waitpid(fpid, &status, 0);
+ ATF_REQUIRE(WIFEXITED(status));
+ ATF_REQUIRE(WEXITSTATUS(status) == 1);
+
+ wpid = wait(&status);
+ ATF_REQUIRE(wpid == -1);
+ ATF_REQUIRE(errno == ECHILD);
+}
+
ATF_TP_ADD_TCS(tp)
{
@@ -3965,6 +4045,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_different_thread);
#endif
ATF_TP_ADD_TC(tp, ptrace__PT_LWPINFO_stale_siginfo);
+ ATF_TP_ADD_TC(tp, ptrace__syscall_args);
return (atf_no_error());
}
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